def _get_file_number(self):
"""
get synced file number for log file name
"""
try:
file_num_task = iodaq.DigitalInput(self.file_num_NI_dev,
self.file_num_NI_port,
self.file_num_NI_lines)
file_num_task.StartTask()
array = file_num_task.read()
num_str = (''.join([str(line) for line in array]))[::-1]
file_number = int(num_str, 2)
# print array, file_number
except Exception as e:
print e
file_number = None
return file_number
def _wait_for_trigger(self, event):
"""
time place holder for waiting for trigger
Parameters
----------
event : str from {'low_level','high_level','negative_edge','positive_edge'}
Returns
-------
Bool :
returns True if trigger is detected and False if manual stop
signal is detected
"""
#check NI signal
trigger_task = iodaq.DigitalInput(self.trigger_NI_dev,
self.trigger_NI_port,
self.trigger_NI_line)
trigger_task.StartTask()
print "Waiting for trigger: " + event + ' on ' + trigger_task.devstr
if event == 'low_level':
last_TTL = trigger_task.read()
while last_TTL != 0 and self.keep_display:
last_TTL = trigger_task.read()[0]
self._update_display_status()
else:
if self.keep_display:
trigger_task.StopTask()
print 'Trigger detected. Start displaying...\n\n'
return True
else:
trigger_task.StopTask()
print 'Manual stop signal detected. Stopping the program.'
return False
elif event == 'high_level':
last_TTL = trigger_task.read()[0]
while last_TTL != 1 and self.keep_display:
last_TTL = trigger_task.read()[0]
self._update_display_status()
else:
if self.keep_display:
trigger_task.StopTask()
print 'Trigger detected. Start displaying...\n\n'
return True
else:
trigger_task.StopTask()
print 'Manual stop signal detected. Stopping the program.'
return False
elif event == 'negative_edge':
last_TTL = trigger_task.read()[0]
while self.keep_display:
current_TTL = trigger_task.read()[0]
if (last_TTL == 1) and (current_TTL == 0):
break
else:
last_TTL = int(current_TTL)
self._update_display_status()
else:
trigger_task.StopTask()
print 'Manual stop signal detected. Stopping the program.'
return False
trigger_task.StopTask()
print 'Trigger detected. Start displaying...\n\n'
return True
elif event == 'positive_edge':
last_TTL = trigger_task.read()[0]
while self.keep_display:
current_TTL = trigger_task.read()[0]
if (last_TTL == 0) and (current_TTL == 1):
break
else:
last_TTL = int(current_TTL)
self._update_display_status()
else:
trigger_task.StopTask()
print 'Manual stop signal detected. Stopping the program.'
return False
trigger_task.StopTask()
print 'Trigger detected. Start displaying...\n\n'
return True
else:
raise NameError, "`trigger` not in " \
"{'negative_edge','positive_edge', 'high_level','low_level'}!"
def _wait_for_trigger(self, event):
"""
time place holder for waiting for trigger
Parameters
----------
event : str from {'low_level','high_level','negative_edge','positive_edge'}
an event triggered via a National Instuments experimental device.
Returns
-------
Bool :
returns `True` if trigger is detected and `False` if manual stop
signal is detected.
"""
# check NI signal
trigger_task = iodaq.DigitalInput(self.trigger_NI_dev,
self.trigger_NI_port,
self.trigger_NI_line)
trigger_task.StartTask()
print("Waiting for trigger: {} on {}.".format(event, trigger_task.devstr))
if event == 'low_level':
last_TTL = trigger_task.read()
while last_TTL != 0 and self.keep_display:
last_TTL = trigger_task.read()[0]
self._update_display_status()
else:
if self.keep_display:
trigger_task.StopTask()
print('Trigger detected. Start displaying...\n\n')
return True
else:
trigger_task.StopTask()
print('Keyboard interrupting signal detected. Stopping the program.')
return False
elif event == 'high_level':
last_TTL = trigger_task.read()[0]
while last_TTL != 1 and self.keep_display:
last_TTL = trigger_task.read()[0]
self._update_display_status()
else:
if self.keep_display:
trigger_task.StopTask()
print('Trigger detected. Start displaying...\n\n')
return True
else:
trigger_task.StopTask()
print('Keyboard interrupting signal detected. Stopping the program.')
return False
elif event == 'negative_edge':
last_TTL = trigger_task.read()[0]
while self.keep_display:
current_TTL = trigger_task.read()[0]
if (last_TTL == 1) and (current_TTL == 0):
break
else:
last_TTL = int(current_TTL)
self._update_display_status()
else:
trigger_task.StopTask()
print('Keyboard interrupting signal detected. Stopping the program.')
return False
trigger_task.StopTask()
print('Trigger detected. Start displaying...\n\n')
return True
elif event == 'positive_edge':
last_TTL = trigger_task.read()[0]
while self.keep_display:
current_TTL = trigger_task.read()[0]
if (last_TTL == 0) and (current_TTL == 1):
break
else:
last_TTL = int(current_TTL)
self._update_display_status()
else:
trigger_task.StopTask();
print('Keyboard interrupting signal detected. Stopping the program.')
return False
trigger_task.StopTask()
print('Trigger detected. Start displaying...\n\n')
return True
else:
raise NameError("`trigger` not in " \
"{'negative_edge','positive_edge', 'high_level','low_level'}!")